Changes are coming to https://stigviewer.com.
Take our survey to help us understand your usage and how we can better serve you in the future.
Take Survey
The SUSE operating system must not forward Internet Protocol version 4 (IPv4) source-routed packets.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-235014 | SLES-15-040300 | SV-235014r991589_rule | Medium |
| Description |
|---|
| Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures. This requirement applies only to the forwarding of source-routed traffic, such as when IPv4/IPv6 forwarding is enabled and the system is functioning as a router. |
| STIG | Date |
|---|---|
| SUSE Linux Enterprise Server 15 Security Technical Implementation Guide | 2024-05-30 |
Details
| Check Text ( C-38202r619311_chk ) |
|---|
| Verify the SUSE operating system does not accept IPv4 source-routed packets. Check the value of the IPv4 accept source route variable with the following command: > sudo sysctl net.ipv4.conf.all.accept_source_route net.ipv4.conf.all.accept_source_route = 0 If the network parameter "ipv4.conf.all.accept_source_route" is not equal to "0" or nothing is returned, this is a finding. |
| Fix Text (F-38165r619312_fix) |
|---|
| Configure the SUSE operating system to disable IPv4 source routing by running the following command as an administrator: > sudo sysctl -w net.ipv4.conf.all.accept_source_route=0 If "0" is not the system's default value, add or update the following line in "/etc/sysctl.d/99-stig.conf": > sudo sh -c 'echo "net.ipv4.conf.all.accept_source_route=0" >> /etc/sysctl.d/99-stig.conf' > sudo sysctl --system |